<%--
  Created by IntelliJ IDEA.
  User: Lai
  Date: 2021/10/1/0001
  Time: 15:49
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<html>
    <head>
        <title>学生管理系统首页</title>
    </head>
    <body>
    <%--获取会话域中的数据
    如果获取到了则显示添加和查看功能的超链接
    如果没获取到就显示登陆功能的超链接--%>
    <c:if test="${sessionScope.username eq null}">
        <a href="${pageContext.request.contextPath}/login.jsp">请登录</a>
    </c:if>

    <c:if test="${sessionScope.username ne null}">
        <a href="${pageContext.request.contextPath}/addStudent.jsp">添加学生</a>
        <a href="${pageContext.request.contextPath}/listStudentServlet">查看学生</a>
    </c:if>




    </body>
</html>
